There is a large batch of horehound (Marrubium vulgare) under a mesquite in our yard. Well, along a fence line that defines “our yard”....
The botanical name for the southwest white pine of this episode is Pinus strobiformis. I read that specific epithet stobiformis comes from the Greek...
I was sort of right, but mainly wrong about poison ivy’s Latinized name. The species found in Arizona is Toxicodendron rydbergii, formerly Rhus radicans...